I don't even have Windows 8 or 8.1 so sorry I have not tested it. It sounds like the install program is not working. What you can do is install it on another machine and simply copy the files over to your Windows 8 machine. The install program does not do anything special - it just extracts and copies files. There could still be a real incompatibility so I will wait to hear if anyone has had any success. Thanks, Warren

I did the following to get my v41 emulator to work on windows 8.1. I just copied the entire install directory from my windows xp system over to my windows 8.1 desktop. Now I can run without administrator with no problem.